Parse any sitemap or sitemap index, even compressed ones, into structured data with last modification, change frequency and priority. Follow index children automatically, or generate a valid sitemap from a simple list.

Given a single domain, checks that site's robots.txt (crawl allow/disallow rules per user-agent, crawl-delay, declared sitemap URLs) and sitemap.xml (existence, URL count, and child-sitemap count if

Checks a web page's hreflang annotations against Google's documented rules and verifies that up to 10 alternates link back. Returns one graded JSON report with stable issue codes.

Gain real-time insights into website navigation and performance with our Web Navigator Status Insight API.

Check whether a URL can be indexed by Google: meta robots, X-Robots-Tag, canonical and robots.txt signals in one call, returned as a graded JSON report.

Validate Open Graph and Twitter Card tags from a page URL or pasted HTML. Get a graded JSON report with preview fields, coded issues, and whether required social meta tags are present.

Finds the weak points in a website Content Security Policy that undermine script-injection protection. Returns one graded JSON report with a verdict, grade and stable issue codes.

Clean untrusted web markup in one call: strip scripts, event handlers and dangerous attributes to prevent injection attacks, while keeping safe formatting. Three cleaning profiles plus a custom allowed tag list.

Easily retrieve real-time URL status information to optimize your online presence and SEO.

Give it a page URL and get back a JSON report on that site's Web App Manifest: the manifest is located, fetched and validated, and the result lists coded issues, an overall grade (A+ to F), a score

SEO audit API. Send a URL, get a 0 to 100 score, a grade, category scores, AI readability scores and a prioritized fix list as JSON.

Instantly check and fetch URL status to enhance your web reliability and user experience.

Keyless Bolivia SFV/SIAT factura electronica validator: official SIN XSD, code ranges, totals math, CUF/CUFD reconstruction with Modulo 11 and Base16, XML-DSig signature check. Rule-coded JSON report.

Validate phone numbers worldwide, detect carrier, line type, country, formatting, mobile status, timezone, and numbering validity with accurate, structured responses.

"Retrieves detailed security analysis results for specific websites, improving cybersecurity measures."

Audit one public page for static SEO signals, 65+ technology fingerprints, and eight security headers with bounded redirects, response size, and private-network blocking.

Validates security.txt policy files (RFC 9116) for syntax and structure. This is syntax and structure validation only; it does not verify sellers (no sellers.json cross-check) or exchange domain

Keyless Costa Rica Hacienda v4.4 comprobante validator: official XSD for 8 document types, the 50-digit clave numerica, CABYS code lists, totals/IVA math, XAdES-EPES signature check. Rule-coded JSON r

Web Content Scanner API analyzes a URL to extract key HTML tags such as titles, descriptions, keywords and headings, optimizing the SEO relevance of the page.

Validate and format identity and business document numbers with correct check digit verification. Confirm whether a number is valid and generate valid sample numbers for software testing.

This API verifies SSL certificates from any website and returns their validity, dates, issuer, protocol, fingerprints, and authorized domains.

Seamlessly extract vital domain data, enhancing your online presence with our API.

Validate and normalize Swedish organisation numbers, Bankgiro numbers and Plusgiro numbers using deterministic format and checksum rules.

The DNS Validation API verifies DNS records for any domain and record type, providing fast, accurate and globally updated results.

Ensure protected communications with the Email Content Security Check API, verifying and filtering harmful content.